461010domain: NAppears in sequencesRoyal paths in a lattice.at n=8A006320Triangle read by rows: T(n,k) (0 <= k <= n) is the number of Delannoy paths of length n, having k return steps to the line y = x from the line y = x+1 (i.e., E steps from the line y=x+1 to the line y = x).at n=46A110098